when your rectum is so swollen from a previous strike to the ass, that when you shit you become overwelmed with a gratuitous amount of stretch marks and hemroids around the anus, sfinctor and even but cheeks. In extreme cases of ass cracking excrement may begin to leak from your penis and or vagina dew to having a swollen shut butt hole.

Holy shit! i just got a massive ass cracker yesterday, and now i always have brown marks in the front of my pants!

Wow! That fag is laying on the floor like a bitch, must have got an asscracker from that guy with the big feet.